Wi-Fi provides exactly the same service as broadband but without the wires.

This is very useful if you have a laptop computer or handheld device as you can access the internet wherever you are in the house.

It works by converting the internet data into a radio signal which is then picked up by each computer in the house using a 'Wi-Fi adaptor'.

There are two types of Wi-Fi in use, an older version which has the snappy name of '802.11b'. This is very slow and has been replaced by the much better system called '802.11g'.

Although these names are hardly memorable, the 'b' and the 'g' are definitely looking out for if you're shopping around for a Wi-Fi system as the 'b' type should be avoided.

SOURCE  http://www.bbc.co.uk